ABSTRACT As other countries continue to expand cultural, medical, and legal distinctions of gender, practices of the United States often reify the gender binary. Subsequently, this Article underscores the need for a critical interdisciplinary examination of the gender binary and its effects on the (re)production of gender stereotypes in media, within the medical sciences, and in law. By exploring the cultural, medical, and legal reification of the gender binary, we argue that the United States healthcare system should begin to acknowledge the spectrum of gender and to broaden patients' legal protections regarding non-disclosure and privacy.